Pressing machine



June 23, 1935. E. DAVIS 2,045,444

PRESSING MACHINE Original Filed April 6, 1928 2 Sheets-Sheet 1 INIVENTOR.

ATTORNEY$ zmwm 23, 1936. E. DAVIS VPRESSING MACHINE 2 Shgetswsheec 2 Original Filed April 6, 1928 Patented June 23, 1936 .ranssnvo MACHINE Application April c, 1928, Serial No. 267,980

- RenewedJanuary 9, 1936 14 Claims.

This'invention relates to pressing machines, such as garment or ironing-presses, and rel-ates particularly to the type in which the movable jaw element or press head has a preliminary movement from open toward closedpos'ition and a final pressing movement into closed position.

One object of the invention is to produce aparticularly simple and efficient manually controlled power means for closing the press preliminary to the final closing of the press by manually controlled power mechanism.

Another object is to provide a new and novel motor means for a fabric pressing machine which closes the press to preliminary closed position and thereafter closes the press to finally closed position.

The invention consists in the novelieatures and in the combinations and constructions hereinafter set forth and claimed.

In describing this invention, reference is had to the accompanying drawings in which like characters designate corresponding parts in all the views.

Figure 1 is a side elevation of a pressing'machine in closed position embodying the invention and having parts broken away to better illustrate the construction.

Figure 2 is an enlarged elevation of parts seen in Figure 1, some parts being in section, showing the power means for preliminarily closing the press, a manual control therefor, an'd contiguous parts. I

As here illustrated my invention is applied to the type of machine shown in the Clisson Patent No. 1,599,115, dated September '7, 19 26.

This invention comprises manually controlled means operated by the prime mover' o'r other motor means of the press for moving themovable element of the press preliminarily toward closed position, before it can be moved'into final pressing position by manually controlledmec'hanism operated by the prime mover or motor.

Cooperating pressing elements or jaws i and 2 open and close upon the work and in the'construction particularly illustrated one of the jaws is movable toward and from the other. The pressing element I in the type of machine here shown, is a buck mounted on a table or bench- 3 supported by a suitable frame 4 and the pressing element 2 isa head movable toward and from the buck and carried by a yoke lever 5 pivoted at 6 between its ends to a standard 1 rising :from the frame. This yoke or press lever v5 forms part of the motion transmitting means between-the prime mover or motor and the head, as'will appear more fully hereinafter. The particular 1 form of closing and opening movement of the press shown in the drawings and particularly described is illustrative only and any other suitable form is contemplated.

The prime mover or motor means includes a rotatable shaft 8 such as that of an electric motor 9 mounted on the frame, the m'otor being preferably a constantly running one.

The motion transmitting means. by"means of which the press is opened and closed by the motor means, comprises a worm ID which is connected to and driven by the motor shaft 8 and'is located in a suitable housing ll supported by the frame. The worm l0 meshes with a' worm PATENT OFFICE gear l2 which is located within the housing H 3 and is-mounted on a shaft l3 journalledin the housing, the worm gear l2 being rotatable on the shaft 13. A periodic clutch located within the housing is shiftable by a shifter i4 outside of the housing. The motion transmitting means further includes a lever i5 pivoted at 16 to the frame and coacting with an eccentric l'i secured to the shaft 13. The motion transmitting means for this motor also includes means normally separated from operative relation and moved to operative relation upon preliminaryclosing ofthe press. This means comprises the links it and i9 pivoted respectively at 20 and'2l to the rear ".arm of the lever l5 and. the rear arm of the lever 5, and a guide link 22 pivoted at It 'to' the frame andat 23 to the link I9.' The -1inksl8 l and I9 are normally out of position to transmit beneath the table 3. A rock arm 21 secured on the shaft 26' coacts with an arm 28 mounted on uthe rock shaft 29 on which the shifter I4' is mounted.

' The depression of the handle 24 throws the periodic clutch into engaged position to connect the Worm gear l2 to the shaft l3 so that the shaft '13 is actuated by the motor shaft 8.

During the rotation of the shaft IS, the eccentrio l1 depresses the lever l5 and further closes the press head 2 for final jaw pressure after the 1 press has been preliminarily closed. If the pressing jaws have not been preliminarily closed, the

end of the cylinder 32.

lever l5 merely idles due to the fact that the thrust parts |B and |9 are out of effective motion transmitting relation.

There is a control means or mechanism within the housing |2 which automatically disengages the clutch during each half revolution of the shaft I3, that is, it throws out the clutch when the press is applying final high pressure and thus leaves the eccentric in down position,-

as in Figure 2.

To open the press, the handle 24 is again depressed so that the clutch again engages to rotate the shaft l3 another half revolution and during this revolution the counterweight and countersprings 3| move the press head 2 into open position. The mechanism thus far described is substantially the same as that shown in the Clisson patent above referred to.

The power means for preliminarily closing the press comprises preferably a fluid operated motor such as a cylinder 32 having a piston 33 therein and means actuated by the shaft 8 for supplying a motive fluid to the motor. The cylinder is here shown as pivoted at 34 to the frame.

The motion transmitting means between the' fluid motor 32 and a press jaw'includes a piston rod 35 which is pivotally connected at 36 to the rear arm of the yoke lever 5. The piston rod 35 is particularly shown as being pivoted directly to a forwardly extending arm 31 of the weight 30 which weight is hung on the pivot 2|. The arm 31 thrusts upwardly against the rear arm of the yoke lever 5 and insofar as this invention is concerned, the arm 31 is part of the yoke lever 5.

A tank 38 is provided for the motive fluid, which is preferably an incompressible fluid such as oil, this being here shown as mounted on the housing The means for forcing the hydraulic liquid to the cylinder 33 is a pump 39 having its rotor mounted on the continuously rotating motor shaft 8 outside of the worm housing. The casing of the pump has an inlet40 leading from the tank 38 and an outlet 4| having a branch 42 connected to a port 43 in the pivoted The outlet 4| also-has a by-pass 43* back into the tank 38. v

The manual means for controlling the flow of oil through the pipe 42'comprises a manually operable valve which, in the illustratedembodiment of the invention, is a normally open valve 44 located in a casing 45 connected in the bypass 43, and the manual when operated closes this valve 44 against the action. of a returning spring 45. The manual means is here shown as a lever 46 pivoted at 41 to the frame or'the table 3 and connected by a link 48 to a lever 49 which is connected to the stem; 50 of the valve 44. Normally the oil circulates continuously from the tank 38 thru the pump and by-pass 43 back into the tank 38. To preliminarily closethe press, the valve 44 is closed by the movement of the handle 46 so that the oil cannot return to the tank 38 and hence is pumped by the pump 39 through the pipe 42 into the cylinder 32 to actuate the piston 33 therein and. preliminarily close the press.

A normally closed spring pressed relief valve 5| is located in a valve casing ,52 connected in the outlet 4| and connected with or particularly supported in the tank 38, the valve casing 52 having an outlet 53 into the tank 38. This relief valve is for the purpose of providing a blow-off for the oil pumped by the pump 39 in the event the operator holds down the handle 46 after the ing the'handle 24.

links come into coacting relation, the head will open up'if the handle 46 is released. Upon de- During the opening of the press, the piston 33 is returned to the lower end of the cylinder 32 and any oil in the cylinder is forced back into the tank 38 through the pipe 42 and branch 43 However, ordinarily there will be no oil in the cylinder .since the operator may release the handle 46 after the press is closed in finally .closed position and the valve 44 opens so that 'the oil is free to drain out of the cylinder 32 and back into the tank 38.

This draining ac tion is facilitated by the current of oil passing through the outlet 4| and by-pass 43 back into the tank.

In the general operation of the press, the operator first depresses the handle 46 thus closing the valve 44 in the by-pass 43 so that the oil is pumped from the tank into the cylinder 32 to actuate the piston 33 to close the press to preliminary closed position, or particularly bring the head 2 down close to the work on the buck, or so close to the buck that there is not room for the operators hand to be inserted between the head 2 and the work on the buck for the purpose of arranging the work. It is an unnatural operation for the operator to depress the handle 46 with one hand and smooth out the work on the buck with the other. The natural reaction of the operator isto release the handle 46 when he starts to make a last minute attempt to smooth out a wrinkle in the work on the buck How- I ever, the distance between the buck and the head when it is preliminarily closed is sufficient 'to prevent the operators hand from being squeezed, and even if the operator did hold the .handle 46 depressed while his other hand was 3 ing hisother hand to operate the heavy pressure handle 24-, the-preliminary closing motor means 32 cannot squeeze the operators hand sufficiently-so thatit cannot be removed from between the jaws;

The preliminary closing of the head brings the dlink I9 into coactingrelation with the link It and until these links come into coacting relation, final pressure can not be applied by depress- At any time before these pression of the handle 24, after the head 2 has i been preliminarily closed, final pressure will be applied inithe same manner as in the Clisson patent above referred to.

tion, cooperating pressing elements, one of which F is .movable toward and from the other and has a preliminary closing movement and a final pressing movement, means for actuating the movable element into final pressing position after it has been preliminarily closed including a,

7 motor, motion transmitting means between the motor and the movable element, manually operated means for controlling the actuation of the motion transmitting means by the motor, and manually controlled means operated by the motor for moving the movable element through its preliminary closing movement.

2. A pressing machine including, in combination, cooperating pressing elements, one of which ismovable toward and from the other and has a preliminary closing movement and a final pressing movement, means for actuating the movable element into final pressing position after it has been preliminarily closed including a motor, motion transmitting means between the motor and the movable element, manually operated means for controlling the actuation of the motion transmittingmeans by the motor, and a fluid operated motor having'a movable pa'rt connected to the movable element, a tank for a motive fluid, a

pump connected to the first motor to be actuated thereby and having an outlet connected to the fluid operated motor and an inlet connected to the tank, and a manually operable valve in the outlet for controlling the flow of fluid to the fluid operated motor.

3. A pressing machine including, in combination, cooperating pressing elements, one of which is movable toward and from the other and has a preliminary closing movement and a final pressing movement, means for actuating the movable element into final pressing position after it has been preliminarily closed including a motor, motion transmitting means between the motor and the movable element, manually operated means for controlling the actuation of the motion transmitting means by the motor, a fluid operated motor having a movable part connected to the movable element, a tank for amotive fluid, a pump connected to the first motor to be actuated thereby and having an outlet connected to the fluid operated motor and an inlet connected to the tank, the outlet having a by-pass into the tank and a normally open valve in said by-pass and manual means for opening the valve.

4. A pressing machine including, in combination, cooperating pressing elements, one of which is movable toward and from the other and has a preliminary closing movement and a final pressing movement, means for actuating the movable element into final pressing position after it has been preliminarily closed including a motor, motion transmitting means between the motor and the movable element, manually operated means for controlling the actuation of the motion transmitting means by the motor, a fluid operated motor having a movable part connected to the movable element, a tank for a motive fluid, a pump connected to the first motor to be actuated thereby and having an outlet connected to the fluid operated motor and an inlet connected to the tank, a relief valve in the outlet, and manually operated means for controlling the efiective flow of motive fluid by the pump to the fluid operated motor.

5. A garment orv ironing press, comprising in combination, a frame, coacting press jaws, a remotor and the movable jaw, and manual means to engage the operating connections and effect a further and pressure movement of the jaw.

- 6. A garment or ironing press, comprising in combination, a frame, coasting press jaws, a reciprocating fluid pressure motor operatively connected with one jaw to close it toward the other jaw, a continuously rotating electric motor mounted in the frame, a pump driven thereby, a fluid pressure connection from the pump to the motor, manual means to control the flow of fluid pressure from the pump to the fluid pressure motor, means to relieve the pressure of the fluid against the fluid pressure motor at the end of the press closing movement, operating connections between the electric motor and the movable jaw, and manual means to engage the operating connections and efiect a further and pressure movement of said jaw.

7. A garment or ironing press, comprising in combination, a press buck and movable head, a fluid pressure motor of low power connected with the head to close it onto the buck, a pump for supplying fluid pressure for the fluid pressure motor,

'a second motor means to drive the pump, valve means to control the flow of fluid pressure to the fluid pressure motor of low power connected with the head to close it onto the buck, a second motor means, operating connections therefrom to the movable head, said operating connections being normally in inoperative position and brought into a position to be operated at the end of the head closing movement, means to transform the motive force of the second motor'means into fluid pressure toenergize the fluid pressure motor and close the press as aforesaid, means to control the fluid pressure to said fluid pressure motor, means to couple up said connections at the end of the head closing movement, and manual means to control the application of motive force of the second motor means to the coupled up operating connections by which to produce final heavy head pressure.

9. A motor mechanism for a pressing machine having pressing jaws and motion transmitting means to open and close the jaws upon the work comprising, in combination, a constantly running electric motor, a fluid pump constantly driven thereby, a fluid motor connected with the pump and adapted to be connected with a pressing Jaw, valve means controlling the operation of the fluid motor, a periodic clutch connected with the electric motor, an eccentric means driven by said clutch and adapted to drive a motion transmitting means connected to a jaw, and manual means controlling the valve means to operate the fluid motor and controlling the clutch to drive therethrough. I

10. A motor mechanism and two-hand control for a pressing machine having pressing jaws and motion transmitting means to open and close the jaws upon the work comprising, in combination, a constantly running electric motor, a fluid pump constantly driven thereby, a fluid motor connected with the pump and adapted to be connected with a pressing jaw, valve means controlling the 013-1 eration of the fluid motor, a periodic clutch connected with the electric motor, an eccentric means driven by said clutch and adapted to drive a motion transmitting means connected to a jaw, a first manual for controlling the valve means to operate the fluid motor, and a second manual spaced from the first manual so as to require an operator to use two hands to operate both manuals and connected with the periodic clutch to control the drive therethrough.

11. A motor mechanism for a pressing machine having pressing jaws and motion transmitting means to open and close the jaws upon the work comprising, in combination, a constantly running electric motor, a fluid pump constantly driven thereby, a fluid motor connected with the pump and adapted to be connected with a pressing jaw, a fluid reservoir having a connection with the inlet side of the pump and an outlet connection with the pressure side of the pump, valve means in the outlet connection of the pump including a normally open valve, a periodic clutch connected with the electric motor, an eccentric means driven by said clutch and adapted to drive a motion transmitting means connected to a jaw, and manual means controlling the normally open valve to close the same whereby the fluid motor is operated and controlling the periodic clutch to drive therethrough.

12. A motor mechanism for a pressing machine having pressing jaws and motion transmitting means to open and close the jaws upon the work comprising, in combination, a constantly running electric motor, a fluid pump constantly driven thereby, a fluid motor connected with the pump and adapted to be connected with a pressing jaw, a fluid reservoir having a connection with the inlet side of the pump and an outlet connection with the pressure side of the pump, valve means in the outlet connection of the pump including a normally open valve and a normally closed relief valve, a periodic clutch connected with the electric motor, an eccentric means driven by said clutch and adapted to drive a motion transmitting means connected to a jaw, and manual means controlling the normally open valve to close'the same whereby the fluid motor is operated and controlling the periodic clutch to drive therethrough.

13. A pressing machine comprising, in combination; cooperating pressing jaws which open and close on the work; motor means to open and close the press with a two-step operation, one motor closing-the press first into preliminary closed position and then the other motor closing the press into final closed position including a constantly running electric motor, a fluid pump constantly driven thereby, and a fluid motor, connected with the pump; motion transmitting means connecting each motor with a pressing jaw; means preventing the final closing motor from closing the press until the press reaches preliminary closed position; valve means controlling the fluid motor; clutch means controlling the operation of the motion transmitting means connected with the electric motor; and manual means to operate the valve means and. the clutch means.

14. A pressing machine comprising, in combination; cooperating pressing jaws which open and close on the work; motor means to open and close the press with a two-step operation first into preliminary closed position and then into final closed position including a constantly running electric motor, a fluid pump constantly driven thereby, and a fluid motor connected with the pump; motion transmitting means connecting each motor with a pressing jaw including means in one of the motion transmitting means separated from operative relation and movable to operative relation by' closing of the press to preliminary closed position; valvemeans controlling the fluid motor; clutch means controlling the operation of the motion transmitting means connected with the electric motor; and manual means to operate the valve means and the clutch means.

ERNEST DAVIS. 

